Metal pole.



C. L. MICHOD.

METAL POLE.

. APPLICATION FILED AUG.3. 1914. 1,156,422. Patented Oct-.12, 1915.

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C. L. MICHOD.

METAL POLE. v APPLICATXON HLED AUG.3. 1914. 1,156,422. Patented 0@1;.12,1915.

' 2 SHEETSSHEET 2.

attozmua S I CHARLES LOUIS MICHOD, OF CHICAGO, ILLINOIS.

METAL POLE.

Specification of Letters Patent.

Patented Oct. 12, 1915.

Application filed August 3, 1914. Serial No. 854,707.

. transmission systems where great'strains are exerted by the wires on the poles, especially when the wires break, and the pressure of the wind, against the line crosswise of thelatter, is very great.

My object is to provide a novel, simple and economical construction of pole, partlc- 'ularly for the purpose stated, which will not be impaired by subjection to the strains imposed against it in use, and will involve the I use of theminimum amount of metal.

Referring to the accompanying drawing F i'gure 1 is a view in elevation of a pole constructed in accordance with my invention, the central portion of the pole and also a part of one of its upright sections being broken away. Fig, 2 is an enlarged section taken at the line 2 on Fig. l and viewed in the direction of the arrow. Fig. 3 is an enlarged broken section taken at the line 3 on Fig. 1 and viewed in the direction of the arrow; and Fig. 4, a perspective view of the lower end of one of the similar upright sec tions in part forming the pole. Fig. 5 is a perspective elevational view of the complete device.

My improved pole in the form illustrated is formed of two main upright members 5 and 6, each formed preferably of sections 7 and 8 of rolled steel, or other suitable springy material, the sections 7 and 8, in the form illustrated, being of angle-shape in cross-section. The members 5 and 6 are preferably so arranged that they converge from the lower to the upper end of the pole, but at a point somewhat below the top of the latter extend preferably in parallel re-- lation, this occurring at that portion of the pole which carries the cross-arms, for attachment'to the wires, one of which arms is representedat 9. The parts just described are connected together by means of a plate 10 located at the top of the pole, a cross plate 11 nearthe lower end of the pole, and preferably below the ground line, and diagonally disposed brace-bars 12 interposed therebetween arranged in zigzag relation, as shown. The plates 10 and 11 and bars 12 extend from one to the other of said members, lying at their ends between the sections 7 and 8, and being secured thereto by bolts, rivets, or other, preferably similar, fastening means, 13 passing through the said sections, the bars 12 and the plates 10 and 11, the fastening means shown serving to rig idly clamp these bars and plates between the sections 7 and 8, and providing a structure strongly braced against forces exerted against the pole from the right or the left in Fig. 1; or, in other words, transverse to the line of the transmission wires.

The members 5 and 6 are provided with enlarged anchorages for holding the poles at fixed points in the ground. In the preferred form of my invention I provide these anchorages as shown, viz.,- by forming each section 7 and 8 with an independent anchorage, these anchorages being constituted as follows: Across the lower end of each section 7 and .8 is a plate 14, shown as of triangular shape, with its short edges substantially flush with, and parallel to, the sides of the said sections, whereby these plates are located at the outside of said sections, 7 and 8, these plates being secured to said sections by riveting, or otherwise securing them, as represented at 15, to outwardlybent portions 16 on the lower ends of said sections, and by brace-bars 17 riveted, or otherwise secured, tothe plates 14: and sections 7 and' 8, as represented at 18 as shown in Fig. 5.

The cross-bars 9 may be secured to the members 5 and 6 in any desirable manner. In the construction shown, these bars are secured in place on the said members against the sections 8, by bolts 19 passing through these bars, the members 5 and 6 and the plate 10, these bars being provided in any desired number.

It will be understood from the foregoing that it is intended the pole be placed so that the wires supported thereby extend at an angle to the widest dimension of the pole. The direction in which the pole is flexible, by being made of springy metal, is thus in line with the wires, and when a force is exerted by the wires against the pole, the lat ter may flex, and as the pole is flexible at that portion which extends between the level of the ground, represented at X, and the anchorages below the level of the thus poles become broken, willv be resisted by,

the earth surrounding the lower end of the pole, thus partially resisting the tendency of" the pole to flex, the pole however flex-t ing, and the earth operating as a cushion, greatly minimizing the shearing stresses .on the pole at its connection with the underground anchorages and transforming in a great measure the shearing stresses on the pole into tensile stresses, with the manifest advantages.

If desired, crossed brace-rods 20 may be provided, these rods being locatedunderground and extending from the heel of each plate 14 upwardly and across to the opposite members 5 and 6 for equalizing the strain on'the plates 14 where the groundis of'non-uniform consistency and preventing the lifting of one side member relative to the other.

The stresses exerted on the pole are generally greater in a line transverse to the wires than in line therewith, and thus the members 5 and 6 are arranged in spaced relation, as described, it being preferred that in a pole about 35 feet above the ground they be spaced about 30 inches apart at the ground line, and about 12 to 15 inches apart at the top of the pole, the spacing of the members 5 and 6 at their lower ends being graduated proportionately to the height of the pole.

.Itwill 'be noted that the rivets 13 extend in line with the wires and at, preferably,

right angles to the forceswhich are usually the maximum ones a to which the pole is subjected in use as above stated, thus the force exerted against the rivets 13 is at right angles to their length, as distinguished from subjecting the ends of the rivets to the stresses, and thus the maximum efficiency of the rivets is utilized.

In accordance with the preferred, illustrated, embodiment of my invention, the sections 7 and 8 are .of the same form and size, and thus are interchangeable, this feature of my construction permitting the poles to be built up from units, which is a great advantage from a commercial standpoint. Furthermore, by constructing the pole, as described, the parts thereof may be shipped in nested, and therefore, compact condition.

It will be manifest that if desired any other suitable means for anchoring the poles in the ground maybe provided.

While I have illustrated and described a particular embodiment of my invention, I do not wish to be understood as intending to limit it thereto as the same may be variously modified and altered without departing from the spirit thereof.

What I claim as new and desire to secure by Letters Patent is 1. A wire supporting pole comprising a plurality of L-shaped angle irons perforated at intervals and having similarly shaped separate anchor bases permitting said angle irons to be placed side by side in pairs with their apexes toward each other, a plurality of diagonal braces lying in' substantially the same plane separating the pairs and connecting two pairs of angle irons to form a pole of greater cross sec tional width in a direction transverse to that of the supported wires whereby said pole is inflexible in said direction when properly embedded in the ground at its lower end.

2. A wire supporting pole comprising a plurality of angle irons perforated at in.- tervals and having similarly shaped.separate anchor" bases permitting said angle irons to be placed side by side in pairs with their apexes toward and adjacent each other, braces between each angle iron and outer edges of its anchor base, a plurality of diagonal braces lying in substantially the same plane separating the pairsand connecting two pairs of angle irons-to form a pole of greater cross sectional width in a direction transverse to that of the support- 

